Prymax Damp Sealer is an easy-to-apply liquid polyurethane sealer designed to protect and stabilise porous surfaces by forming a hard yet flexible plastic seal. It is suitable for use on wood, plaster, brick, concrete and similar substrates, providing effective protection against moisture ingress.

Once applied, Prymax Damp Sealer penetrates and consolidates fragile or dusty surfaces, helping to seal out damp and moisture while strengthening the underlying material. The cured coating creates a tough, hard-wearing finish while remaining flexible enough to accommodate minor surface movement without cracking.

This damp sealer is ideal for use as a pre-treatment and protection layer prior to further finishing. Once fully cured, surfaces treated with Prymax Damp Sealer can be tiled over, painted or wallpapered, making it suitable for both domestic and commercial environments where moisture control is essential.

Prymax Damp Sealer is simple to apply and delivers reliable, long-lasting performance on a wide range of porous materials.

Coverage: For all three coats, allow approximately 500g per square metre, depending on surface condition and porosity.

AVAILABLE SIZES

Prymax Damp Sealer is available in the following sizes to suit different project requirements:

• 1kg – ideal for small repairs and localised damp areas
• 2.5kg – suitable for medium-size rooms and walls
• 5kg – ideal for larger damp treatment projects
• 20kg – suitable for extensive commercial or whole-room applications

Here are 5 more great reasons to buy from us:

Returns are easy, if the items are�unopened and unused�then simply�contact us�for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down.

We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again.

Ordering from APEX Fibreglass Roofing Supplies is 100% safe and secureso you can rest easy. Your personal details are never shared, sold or rented to anyone either.

Here are 5 more great reasons to buy from us:

Returns are easy, if the items are�unopened and unused�then simply�contact us�for a returns number and send your item to our returns centre for fast processing. We'll get you a replacement or refund in a snap!

In the unlikely event that you find your item cheaper at another online store, just let us know and we'll beat the competitor's pricing hands-down.

We insist that you love everything you buy from us. If you're unhappy for any reason whatsoever, just let us know and we'll bend over backwards to make things right again.

Ordering from APEX Fibreglass Roofing Supplies is 100% safe and secureso you can rest easy. Your personal details are never shared, sold or rented to anyone either.