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Prymax Black Pond Sealer

Prymax Pond Sealer is a special formulated sealer made from polyurethane. This is made for dust proof and to protect flooring made of concrete, walls and soffits from ingress of dirt, grease, oil and a large amount of chemicals. This is also suitable to use with cork, metal & timber substrates.

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Product Description

A specially formulated single pack moisture cured polyurethane sealer for sealing concrete rendered ponds under the water line, Prymax Marine Clear Seal should be used above the waterline and for paving around the pond. For damp proofing internal render, plaster, plasterboard and sealing dusty concrete floors, can be used externally on walls if overpainted to protect from UV. Can be used to coat internal woodwork. 


  • One pack, ready for use.
  • Hard wearing, durable and long lasting.
  • Non-absorbent, easily cleaned reducing maintenance.
  • Unaffected by water, oils and most common chemicals
  • Quick and easy application. 

Technical information. 

Prymax Pond and Damp sealer is designed to be applied in 3 thin coats with the second and third coats being applied when the previous coat is finger tacky like strong Sellotape or touch dry, for colours 2 coats of clear followed by 2 coats of colour all applied within 3 hours of each other, if more than 3 hours has elapsed then it must be left for 24 hours and sanded down before applying further coats.  

Coverage:  3 coats of clear 500gms for the 3 coats, for colour 400gms of clear for 2 coats and 400gms of colour for 2 coats. 
Drying Time: 45 – 60 minutes @ 20 Degrees C / 70% relative humidity 
Full Cure & Chemical resistance: 72 hours 
Light Traffic: 12 hours 
Shelf Life: 24 months in unopened sealed container, once opened product will begin to cure. 
Flash Point:  27℃  
Viscosity: 250-500 cps 
Specific Gravity: 0.95 
Cleaning: Clean equipment with Prymax thinners, prymax cleaner or acetone 
Preparation: All surfaces to be coated must be dry and porous new concrete render should be given 21- 28 days to fully cure before coating, if a water proofer has be added to render sand down surface to obtain a key and remove residual water proofer, repair any cracks in the surface before coating, remove any loose plaster. 


Prymax Pond / Damp Sealer is not recommended for hard dense tiles or power floated floors, bitumen, rubber, vinyl and other plastic flooring. 


The information contained herein is to the best of our knowledge true and accurate and is given in good faith but without warranty, the user will be deemed to have satisfied themselves independently as to the suitability of our products for their own particular purpose, in no event shall CFSNET LTD be liable for consequential or incidental damages. 
Users must always refer to the most recent issue of the technical Datasheets, copies of which will be supplied on request.


Aquacadabra acts as credit broker/intermediary and not as a lender. Credit products are provided exclusively by Klarna Bank AB, which is authorised and regulated by the Swedish Financial Services Authority, with limited supervision by the Financial Conduct Authority.

Who should my customers contact if they have questions?

All existing customer loans have been automatically transferred to Klarna and your customers have also been notified directly. There will be no changes to existing terms and conditions and customers do not have to take any action. From 1st January 2019 Klarna became the lender on all new loan applications.

Should your customers contact you regarding any questions they may have, please ask them to visit: https://www.klarna.com/uk/CBRF or, if they have any other servicing needs about their loan agreement they can call us on 0333 321 6080.

Delivery & Returns

We really want you to be happy with the product that you've received. If however, when the goods arrive they're not what you want, then no problem - we have a 60 day no quibble return guarantee. Just let us know that you're going to return the item(s) by contacting us (stating your Order Number) and complete the returns packing slip that will have been included with your delivery. This will help us to quickly identify the item that you have returned (unopened and unused) - and we'll put a refund through for you.


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