Black Bear Thick Epoxy Resin

Black Bear Thick Resin is a medium bodied resin specifically designed as an adhesive for structural and laminating purposes. Black Bear Thick Resin allows for the use of many fillers and bulkers when making fairing and filling putties and compounds, gluing slurries etc.

Black Bear Thick Resin when used with Black Bear 15-20 hardener and using the appropriate additive makes very good fairing and filleting compounds which fight the urge to slump.

Black Bear is next day sand able when applied in temperatures of 16 deg C if temperature is higher it will cure quicker, if lower temperatures are present then patience is the tool that is required.

other hardeners available are 7/11 a fast hardener and 30/35 a slow hardener

  • Black Bear is next day sand able when applied in temperatures of 16 deg C.
  • Black Bear does not wax or blush.
  • Black bear has a clear to amber appearance it has a typical strength of 1800 - 2200 pounds per sq inch.
  • Black Bear can be stored for more than 12 months.
  • Black Bear along with all our other resins has a high amount of natural ingredients making it the best for moisture exclusion and giving a very low shrinkage when cured.
Remember all our hardeners can be blended together to give the ideal cure time for your project

This resin like all our other resins must be mixed at two parts resin to one part hardener by volume or weight (we recommend digital scales brought from the super market and covered with cling film for any long project) Mix the hardener and resin well, once mixed additives such as workshop mix or workshop 10/20 can be added for gluing or fairing (see additives for more information) .


Black Bear Thick Resin can be used with Black Bear 30-35,15-20 and 7-11 hardeners, for gluing most substances.
It can be used just with its hardener added to go over any cloth work and build depth and thickness and fill in any weave that has been soaked out or to build a barrier coat.
With fillers such as silica micro balloons workshop 10/20 etc it can be used to fair out areas and help bring back the shape to a hull or object when used with 15-20 hardener it has very good anti slump properties.
When gluing adding workshop mix or other additive helps fill voids however on large areas we recommend drilling of small holes which allow the epoxy to push through like worms these set to become epoxy nails and help prevent pockets of air from being trapped in the layers
When adding powders to make putty or slurry remember to always leave a shine on the mix otherwise it may be epoxy starved and crumble and not cure (do not make the mix to dry)
When moulding or filling large voids do so in small layers to avoid over heating peek exothermic reaction is approximately 180 deg C
Black Bear has a pounds to square inch strength of 1800 to 2200 (practically speaking this is stronger than most substrates meaning the wood grp will break before the epoxy)

Black Bear 7-11 hardener

Black Bear 7-11 hardener can be used as an accelerator for Black Bear 30-35 and 15-20 Hardeners when customized cure times are required. Appropriate applications of 7-11 hardeners formulas include hardware bonding, spot filling, and fairing. Additionally, the superior bonding strength of 7-11 hardener mix is ideal for high strength secondary bonding applications such as structural tabbing and repair laminations.

The rapid cure time of 7-11 allows overnight curing in low temperature conditions so your project can be sanded next day

We do not recommend mixing more than 140 grams. of formula unless rapid application techniques are incorporated.

An induction time of 1-2 minutes is recommended prior to application of formula. We have found the low viscosity of 7-11 hardener allows for fast wet-out of the heavy reinforcing fabrics often used in repair applications. 30-35 or 15-20 may be blended with 7-11 to retard the mix of the Black Bear 7-11 hardener when customized cure times are required.

Remember Surfaces coated must be carefully prepared prior to re-coating and bonding dust and grease free and a good scratched key over the whole area to be bonded


Black Bear 15-20 Hardener

Black Bear 15-20 hardener has a moderate gel and thin film set times providing great advantages when filleting and fairing Black Bear resins when mixed with 15-20 hardener and the appropriate thickener will gel and set quickly enough to avoid draining out and sagging, while still giving you the time to get the job done. We recommend this hardener when “overnight” sanding is more important than continuous laminating and open time (as provided by Black bear 30-35 Hardener)

Black bear 15-20 will also provide a beautifully smooth void free finish, with great resistance to milking out during application and fogging in critical clear coating applications.

Cure speed gelling and thin film set can be adjusted by adding either 30-35 hardener or 7-11 hardener as needed but the mix must remain 2 parts resin to 1 part hardener

This is our standard hardener that we recommend for all gluing and fairing work , provided the customer is experienced enough and happy to work at a faster rate. However when wetting out multiple thickness of cloth we recommend slow hardener to ensure the epoxy hardener mix has properly wet out before it starts to gel


Black Bear 30-35 Hardener

Black Bear 30-35 hardener is a hardener that will give you a working pot life of 30 – 35 minutes , when used with black Bear thick or thin resin at a ratio of 2 parts resin to 1 part hardener it gives a good extended gel time allow you to control the application

Special features exhibited by this product include blush free surfaces, good ultraviolet stability, smooth finishes in cured films, excellent osmotic resistance, and the ability to cure under high humidity

We recommend 30- 35 hardener when working on large areas and on cloth were we want the maximum amount of penetration before gel starts. 30- 35 can be mixed with our other hardener to get the correct working time for your application

As with all our hardeners 30-35 is blush and wax free there is no need for any wash down between coats (if the surface can be marked with your thumb nail , then you can go straight on top if it can not a simple roughing or abrasion is needed to give a good key)

Use: If you are a beginner to the use of epoxy we recommend that you choose 30-35 hardener, this gives you an extended pot life enabling you to take time on your work and giving you the opportunity to correct any thing along the way. When doing large areas or when large mixes are needed always consider 30-35 hardener first.

Caution: Not recommended for use below 8 degrees C unless cure time is available.

This means that you simple have to give the product longer so if it is below 10 degrees C yes it will work but you have to wait but as a policy we would recommend a quicker hardener the cooler it gets

Remember you can mix 30-35 with any other Black bear Hardener to achieve to work and cure time you want but the mix ratio must remain 2 parts resin to 1 part hardener

Black Bear Boating & Leisure will deliver any paid for goods in the quickest possible way, usual delivery is 2/3 days however were we are sending goods overseas (this means across any water) this period may be extended up to two weeks or longer at the company’s discretion.

The company has an ongoing belief that good customers expect and deserve a top class service.
In the UK, any problem reported to us on delivery will be dealt with in the following manner: