Hempel Thinners 811 (No 1) - 750ml

Hempel’s Thinner 811 (No. 1) 08111 is a spirit-based thinner and tool cleaner for compatible Hempel one-component primers, topcoats and varnishes. It is specially recommended for alkyd coatings and should only be added where the relevant coating Product Data Sheet specifies 08111.

Hempel’s Thinner 811 adjusts the application consistency of compatible coatings. Where authorised by the coating Product Data Sheet, a small quantity can improve flow, aid paint distribution and reduce brush or roller marks. It can also help keep the coating open for longer where elevated surface temperatures create a risk of dry spray.

Hempel coatings are normally intended to be applied after thorough mixing without automatically adding thinner. Mix the coating at approximately 20°C and test the application first. Where thinning is necessary, add Thinner 811 gradually and keep the quantity within the coating-specific maximum.

Excessive thinning reduces the resulting film build, may require additional coats and increases the risk of sagging. Paint below 10°C should normally be warmed towards 20°C rather than corrected with additional thinner.

Intended Applications and Compatibility

• Hempel’s Multicoat 51120: Thinner 811 08111 and Thinner 808 08081 are both listed. Maximum thinning is 5% by volume for brush, roller and paint-pad application. When Multicoat is used as a primer, its first coat may be thinned by up to 10% with a specified Hempel thinner.
• Hempel’s Brilliant Gloss 53200: Thinner 811 08111 is specified as both the thinner and tool cleaner. Maximum thinning is 5% by volume for brush, roller and paint-pad application.
• Hempel’s Bilge & Locker Paint 5112B: Thinner 811 08111 and Thinner 808 08081 are listed. Maximum thinning is 5% by volume for brush, roller and paint-pad application.
• Hempel’s Classic Varnish 01150: Thinner 811 08111 is specified as the thinner and cleaner. For a new varnish system, the first coat may be thinned by up to 20%, the second by up to 10%, followed by three undiluted coats.
• Hempel’s Dura-Gloss Varnish 02080: Thinner 811 08111 is specified as the thinner and cleaner, with the first coat thinned by up to 20%, the second by up to 10% and the final three coats applied undiluted.
• Hempel’s Dura-Satin Varnish 02040: Thinner 811 08111 is specified as the thinner and cleaner, with the first coat thinned by up to 20%, the second by up to 10% and the final three coats applied undiluted.
• Hempel’s Favourite Varnish 01250: Thinner 811 08111 is specified as the thinner and cleaner, with the first coat thinned by up to 20%, the second by up to 10% and the final three coats applied undiluted.
• Hempel’s Primer Undercoat 13201: Thinner 811 08111 is specified as the thinner and cleaner. Maximum thinning is 10% for brush, roller or paint-pad application and 15% for airless spray.

Compatibility note: Thinner 811 does not have a universal dilution ratio. Always follow the current Product Data Sheet for the coating, coat sequence and application method.

Application and Use Guidance

• Confirm that Hempel’s Thinner 811 08111 is named in the current Product Data Sheet for the coating.
• Thoroughly stir the coating before assessing its application viscosity.
• Bring cold coating material towards approximately 20°C before use.
• Test the coating without thinner first.
• Where thinning is permitted and necessary, add Thinner 811 gradually.
• Mix thoroughly after each addition.
• Do not exceed the maximum percentage stated for the coating and application method.
• Keep thinning to the minimum required for satisfactory flow and film formation.
• For new wood varnish systems, follow the coating-specific first-coat, second-coat and finishing-coat dilution sequence.
• Do not use additional thinner as the first solution for paint below 10°C; warm the paint towards 20°C instead.
• Where warm surfaces create dry spray, a small permitted quantity may keep the paint open for longer.
• Account for reduced volume solids and film build where significant thinning is authorised.
• Use Thinner 811 as a tool cleaner only where the relevant Product Data Sheet specifies it.
• Use suitable personal protective equipment and maintain adequate ventilation.
• Consult the current Safety Data Sheets for both the thinner and coating before use.

Key Features

• Hempel product code 08111
• Also identified as Hempel’s Thinner 811 No. 1
• Spirit-based marine paint thinner
• Tool cleaner for compatible Hempel coatings
• For one-component or single-pack primers
• For compatible one-component topcoats
• For compatible one-component varnishes
• Specially recommended for alkyd products
• Can adjust coating viscosity where permitted
• May improve brush, roller and paint-pad flow
• May reduce brush and roller marks
• May help reduce dry spray under suitable application conditions
• Compatible with selected Hempel primers, gloss finishes, bilge coatings and varnishes
• No universal thinning ratio
• Maximum dilution depends on the coating and application method
• Must be added gradually after the coating has been mixed
• Excessive thinning reduces film build
• Excessive thinning increases sagging risk
• Cold paint should normally be warmed rather than excessively thinned
• Coverage is not applicable because this is a thinner rather than a coating

Frequently Asked Questions

What is Hempel’s Thinner 811 08111 used for?
It is used to adjust the application consistency of compatible Hempel one-component primers, topcoats and varnishes. It is also specified as a tool cleaner for selected products.

Is Hempel’s Thinner 811 suitable for alkyd paint?
Yes. Hempel specially recommends Thinner 811 for compatible alkyd products. Compatibility must still be confirmed against the individual coating Product Data Sheet.

Is Thinner 811 suitable for every Hempel coating?
No. It is not a universal thinner. Only use product code 08111 where it is named in the current Product Data Sheet for the coating.

How much Hempel’s Thinner 811 should be added?
There is no single dilution ratio. Current limits range from 5% for products such as Brilliant Gloss to 20% for the first coat of specified varnishes.

Can it be used with Hempel’s Multicoat?
Yes. Multicoat lists both Thinner 811 08111 and Thinner 808 08081. Maximum thinning is 5% for normal brush, roller or paint-pad application. The first coat used as a primer may be thinned by up to 10% with a specified Hempel thinner.

Can it be used with Hempel’s Brilliant Gloss?
Yes. Thinner 811 is the specified thinner and cleaner for Brilliant Gloss. Maximum thinning is 5% for brush, roller and paint-pad application.

Can it be used with Hempel’s Bilge & Locker Paint?
Yes. Its Product Data Sheet lists both Thinner 811 and Thinner 808. Maximum thinning is 5% by volume for brush, roller and paint-pad application.

How is Thinner 811 used with Hempel varnishes?
For Classic Varnish, Dura-Gloss Varnish, Dura-Satin Varnish and Favourite Varnish, the first coat on a new varnish system may be thinned by up to 20%. The second coat may be thinned by up to 10%, followed by three undiluted coats.

Can it be used with Hempel’s Primer Undercoat?
Yes. Thinner 811 is the specified thinner and cleaner. The current maximum is 10% for brush, roller and paint-pad application or 15% for airless spray.

Can Hempel’s Thinner 811 be used for spray application?
Selected compatible coatings can be sprayed. Spray requirements vary by coating, so follow the coating Product Data Sheet or obtain product-specific guidance from Hempel.

Should Thinner 811 be added before mixing the paint?
No. Thoroughly mix the coating and test the application first. Add thinner gradually only where it is required and permitted.

Should extra thinner be added when the paint is cold?
Not as the first response. Coating material below 10°C should normally be warmed towards approximately 20°C rather than corrected by excessive thinning.

Can Thinner 811 help prevent dry spray?
A small permitted quantity can keep a coating open for longer and may reduce dry spray on relatively warm surfaces. Do not exceed the maximum stated in the coating Product Data Sheet.

Why should thinning be kept to a minimum?
Thinner increases the liquid volume without adding coating solids. Excessive dilution therefore reduces dry-film build, may require additional coats and increases the risk of sagging.

Can Hempel’s Thinner 811 clean application tools?
Yes. Hempel identifies it as a tool cleaner for compatible one-component primers, topcoats and varnishes.

Is Hempel’s Classic Varnish the same as Hempel Classic antifouling?
No. Hempel’s Classic Varnish 01150 is a clear alkyd varnish compatible with Thinner 811. Hempel Classic 71220 is a separate antifouling product with different thinner requirements.

Does Hempel’s Thinner 811 have a coverage rate?
No. Coverage is not applicable because Thinner 811 is a solvent thinner and tool cleaner rather than a film-forming coating.